On Wednesday night, a former US Marine walked into the crowded dance hall at the Borderline Bar & Grill. He took his gun out and began firing, shooting and killing 12 people before he shot himself.
The names of the 12 people that Ian David Long killed should not be forgotten. These people included someone who survived the Las Vegas shooting last year, the niece of an actress, and an off-duty sergeant.
The information below was gathered by NBC News.
Cody Coffman, 22, was a youth baseball coach. He planned to join the Army, according to his dad.
Jason Coffman, his father, told reporters that going to the Borderline Bar and Grill was a Wednesday night ritual for his son and some friends.
"I talked to him last night before he headed out the door. First thing I said was, 'Please don't drink and drive.' The last thing I said was, 'Son, I love you.' That was the last thing I said," Coffman recalled, melting into tears.
Cody had three younger brothers and a little sister on the way, Coffman said.
"I cannot believe this has happened to my family," Coffman said. "I am speechless and heartbroken."
Telemachus Orfanos, 27, survived the Route 91 Harvest festival shooting last October in Las Vegas. That shooting killed 58 people. He had also been a Navy SEAL, said his father, Marc.
Justin Meek, 23, was an alumnus of California Lutheran University. He died a hero. According to the university, he "heroically saved lives in the incident."
Cal Lutheran students said witnesses told them that Meek jumped in front of his sister and others to shield them.
"Everything he did was really brave," said Meek's friend Lala Lyman, who wasn't at the bar. "It was heroic. We lost someone truly great."
"Cal Lutheran wraps its arms around the Meek family and other families, and around every member of this community of caring," the university said on its website.
Meek graduated from Cal Lutheran in May. He was a lover of line dancing, and he even founded Cal Lutheran's line dancing club. He'd promoted Wednesday's "College Country Night" event on his Instagram page.
Sean Adler, 48, was a married father of two. He was working at Borderline to make extra money, his sister Valarie Adler told NBC Los Angeles. He had just realized his dream of opening a coffee company.
According to his sister, Adler tried to disarm the shooter.
"That is typical of Sean. He was a protector, always sticking up for people. He was a caring, compassionate individual. I just don't understand. I don't understand the world."
SGT. RON HELUS
Sgt. Ron Helus, 54, was also killed trying to save lives. Helus, who had been with the Ventura County Sheriff Department for 29 years, was married with a son.
He called his wife just before he went into the bar, where he was killed in a shootout with the gunman.
"I gotta go. I love you, I'll call you later," his boss, Sheriff Geoff Dean, quoted him as saying.
Sheriff's Sgt. Eric Buschow said Helus "had every intention of going in there and ending that threat and saving lives."
"Unfortunately, he was just met immediately with gunfire," Buschow said. "It's a tragic loss for all of us, for the community."
Alaina Housley, 18, a student at Pepperdine University, was the niece of the actress Tamera Mowry-Housley and her husband, former Fox correspondent Adam Housley. She was a freshman majoring in English.
Housley later issued a statement on behalf of Alaina's parents, which said, in part: "Words can't describe our grief over losing our daughter, Alaina. She was everything we could hope for in a child: kind, smart, beautiful and respectful."
Madeleine Carr, a junior majoring in journalism who once interviewed Housley, said she quickly became a prominent member of the college community.
"She's only been here since August, and she'd already found her way into choir and mock trial and all these different facets of the community," Carr said. "Usually, you see people just getting involved in one — not all. And she seemed to have found her way into a lot of people's hearts."
Former marine Daniel Manrique was among the slain.
"My brother was a veteran who wanted to help fellow recovering veterans in re-entering society and gave his all to supporting veteran mental health," his brother Marcos Manrique wrote on Instagram, according to NBC Los Angeles. "He ran in to help people escape the violence and ultimately gave his life protecting others. Describing the pain would not do it justice. I'll be remembering a hero, a brother, and a role model."
Manrique was the Pacific regional program manager for Team Red, White & Blue, a nonprofit veterans service organization, whose executive director, John Pinter, said in a statement: "Dan's life was dedicated to serving others, during his military career and beyond."
Blake Dingman, 21, lived in the Newbury Park area of Thousand Oaks and had played baseball at Hillcrest Christian School, the Pasadena Star-News reported.
"We were really proud of him," a great-aunt, Janet Dingman, told the newspaper. "He was a really fun, energetic and loving nephew."
Noel Sparks, 21, was a student at nearby Moorpark College, the Press Enterprise newspaper of Riverside reported. Her death was confirmed by her church, United Methodist Westlake Village.
Two others, Kristina Morisette, Jake Dunham, and Mark Meza were identified late Thursday. Little information about them was immediately available.